Aesop's Fables, translated by Laura Gibbs (2002)

As he chased after a wolf, the dog capered with pleasure at how quickly
he was able to run, revelling in his own strength. In fact, the dog actually
imagined that the wolf was running away from him because of his superior
prowess. But then the wolf turned around and said to the dog, 'I am not
running away from you! I'm just afraid of being chased down by your master.'
The fable shows that you should not take pride in the good qualities
that actually belong to someone else.

Source:
Aesop's Fables. A new translation by Laura
Gibbs.
Oxford University Press (World's Classics): Oxford, 2002.
NOTE: New
cover, with new ISBN, published in 2008; contents of book unchanged.